Bidirectional Path Tracing and Metropolis Light Transport

I implemented vertex connection and merging (VCM) in my renderer. VCM is an extension of bidirectional path tracing (BPT) that adds a famil...

Several months ago, I implemented a couple additional bidirectional path tracing features described in Veach's thesis. Specifically, I a...

Bidirectional path tracing is very good at rendering scenes lit primarily by indirect light. Unlike unidirectional path tracing, bidirection...

Although bidirectional path tracing can efficiently render many types of paths, it has a very difficult time rendering specular–diffuse–spec...

I recently revisited my bidirectional path tracer and found a small bug in my Metropolis implementation. For choosing the location on the im...

I just finished implementing Metropolis light transport (MLT) in my bidirectional path tracer. I will post more details later, but for now ...

I finished my multiple importance sampling (MIS) implementation by adding the one missing piece: correct evaluation of the probability densi...

Last year I implemented (see my blog posts  here and here ) a microfacet model for reflection and refraction based on the 2007 paper by Wa...

I implemented the diffuse and specular parts of the Disney "principled" BRDF ( slides ,  notes ), a new multipurpose analytic BRDF...

My improved BSDF system is very general and makes it really easy to add new BSDFs that contain any kind of reflection and transmission. To t...

I added support for multiple light sources to my bidirectional path tracer. For now, when selecting an origin light for the light subpath, ...